Remove piwik config fallback for privacy policy URL (#9390)

* Remove piwik config fallback for privacy policy URL

* Clean up imports

src/IConfigOptions.ts

@@ -141,9 +141,6 @@ export interface IConfigOptions {
         servers: string[];
     };
 
-    piwik?: false | {
-        policy_url: string; // deprecated in favour of `privacy_policy_url` at root instead
-    };
     posthog?: {
         project_api_key: string;
         api_host: string; // hostname

src/toasts/AnalyticsToast.tsx

@@ -28,8 +28,6 @@ import {
     showDialog as showAnalyticsLearnMoreDialog,
 } from "../components/views/dialogs/AnalyticsLearnMoreDialog";
 import { Action } from "../dispatcher/actions";
-import { SnakedObject } from "../utils/SnakedObject";
-import { IConfigOptions } from "../IConfigOptions";
 import SettingsStore from "../settings/SettingsStore";
 
 const onAccept = () => {
@@ -78,16 +76,7 @@ const onLearnMorePreviouslyOptedIn = () => {
 const TOAST_KEY = "analytics";
 
 export function getPolicyUrl(): Optional<string> {
-    const policyUrl = SdkConfig.get("privacy_policy_url");
-    if (policyUrl) return policyUrl;
-
-    // Try get from legacy config location
-    const piwikConfig = SdkConfig.get("piwik");
-    let piwik: Optional<SnakedObject<Extract<IConfigOptions["piwik"], object>>>;
-    if (typeof piwikConfig === 'object') {
-        piwik = new SnakedObject(piwikConfig);
-    }
-    return piwik?.get("policy_url");
+    return SdkConfig.get("privacy_policy_url");
 }
 
 export const showToast = (): void => {